Sigma Greenhouse

Spacious Backyard Kits, 10 ft Wide

4.7 · 90 reviews
Save $600
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse
Sigma Greenhouse

Sigma 39

Sigma greenhouse kits are arched backyard greenhouses rated for 4.5 ft (55 psf) of snow and 65 mph wind, with 6 mm twin-wall polycarbonate panels and a 10-year warranty. They're for sale in 5 sizes, all 10 ft wide, so you can choose the length that fits your space. Find your greenhouse.

Size: Sigma 39 · 10′ × 39′Size guide
$6,250$6,850Save $600

Free shippingTo nearest terminal
10-year warrantyFrame & panels
Pre-cut panelsFor easier installation
Guided assemblyVideos and live chat
Questions? Talk to a grower.

Mon–Fri 9am–5pm EST or Send a Message

Call us1-877-669-1286

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Which size is best for your garden?

Get this sizing guide with photos and bed layouts.

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  • Insulated Doors NEW – Helps reduce heat loss and drafts, creating a more stable growing environment and improving energy efficiency.
  • Upgraded Door Handles NEW – Smooth, reliable operation with a sturdy grip for easier daily access and long-term durability.
  • Aluminum Polycarbonate Trim NEW – Securely locks panels in place along the arch for added strength, better weather resistance, and a clean, finished look.
  • Window/Door Latch NEW - Makes the door and window open together.
  • Improved Snow Load [NEW] - Rated for a snow load of up to 55 psf (about 4.5 ft of snow).
  • Wind resistant up to 65 mph for those living in gusty climates.
  • Comes with two doors (one at each end).
  • Made with a heavy-duty galvanized steel frame and 6 mm twin-wall polycarbonate panels.
  • Arched shape - helps wind, snow and hail slide off the sides.
  • Extendable beyond 100 ft - so you can expand your greenhouse when you're ready.
  • Maintenance-free means you have more time to focus on your garden.
  • We offer a 10-year warranty because our greenhouse is heavy-duty and long-lasting.
  • Access to our private Facebook group to connect with and learn from other greenhouse owners.
  • The Sigma Greenhouse is available in 5 size configurations. Plus, you may purchase an extension kit, to extend the length of the greenhouse.
  • Extendable & Customizable
  • Snow Load Up To 55 psf 
  • Wind Resistant up to 65 mph
  • We offer a 10-year warranty because our greenhouse is heavy-duty and long-lasting.

Planta Greenhouses se dedica a entregar su pedido rápidamente, para que pueda comenzar a utilizar sus productos de invernadero de inmediato.

Debido a que los invernaderos se empaquetan en cajas grandes, tienen requisitos de envío únicos, que incluyen:

  • Nos comunicaremos con usted para confirmar el precio de envío, según su ubicación y el tamaño del pedido.
  • El envío para la mayoría de los pedidos cuesta entre $250 y $450. Las entregas a zonas remotas pueden tener un costo adicional.
  • Al realizar su pedido, asegúrese de introducir el teléfono y la dirección correctos al finalizar la compra. Nos pondremos en contacto con usted por teléfono antes del envío. No nos responsabilizamos de entregas a direcciones incorrectas.
  • Como parte del proceso de entrega, necesitamos un número de teléfono localizable (para que la empresa de mensajería se comunique con usted) antes de enviar el artículo.
  • Haremos todo lo posible para enviar su pedido lo más rápido posible y mediante el medio de transporte que usted especifique. Sin embargo, si no hay instrucciones específicas, aplicaremos nuestro criterio y realizaremos el envío de la manera más rápida y económica. No nos responsabilizamos por retrasos en la entrega debidos a circunstancias ajenas a nuestra voluntad.
  • No realizamos envíos a apartados postales, ya que en la mayoría de los casos deberá firmar para recibir su artículo.
  • No disponemos de servicio de entrega urgente. Los componentes del invernadero se entregan en varias cajas, la más grande de las cuales pesa 36 kg. El invernadero se entregará en la entrada de su casa. Por favor, coordine el traslado del paquete a su ubicación de instalación.
  • Los pedidos realizados los fines de semana y días festivos se procesarán el siguiente día hábil.
Free guide

The Beginner's Guide for Greenhouse Owners

Tell us where to send it and it's yours.

Compare Sigma Greenhouse Sizes

This greenhouse comes in several size configurations. Every greenhouse extends in 6.5 ft sections, so pick the length that fits your plot and your plans.
Sigma Greenhouse Sigma Urban
10′ × 13′
Sigma Greenhouse Sigma 20
10′ × 20′
Sigma Greenhouse Sigma 26
10′ × 26′
Sigma Greenhouse Sigma 32
10′ × 32′
Sigma Greenhouse Sigma 39
10′ × 39′
Price
Sale$3,450
$3,250
Sale$4,300
$4,000
Sale$5,150
$4,750
Sale$6,000
$5,500
Sale$6,850
$6,250
About
Beds along both sides and a bench for seed trays: room for a full season of tomatoes and peppers.
Room for in-ground beds, trellised crops and a potting bench.
Long beds on both sides, tall crops at one end and a wheelbarrow-wide path.
Several crop zones, a propagation corner and space for a heater.
The largest Sigma: beds, benches, storage and a work area for year-round growing.
Width
10 ft
10 ft
10 ft
10 ft
10 ft
Length
13 ft
20 ft
26 ft
32 ft
39 ft
Height
7 ft
7 ft
7 ft
7 ft
7 ft
Sq ft
130 sq ft
200 sq ft
260 sq ft
320 sq ft
390 sq ft
Owner reviews
4.7 Read all 90 reviews
Read all 90 reviews
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Dome-shaped Greenhouse
About this model

Dome-shaped Greenhouse

Sigma greenhouse has a dome-shaped arch which sheds snow and rain, and the galvanized steel frame with 6 mm twin-wall panels is rated for 55 psf of snow. Insulated doors help keep the warmth in.

pg why planta
Why Planta Greenhouses

Winter-Ready Greenhouses

Heavy-duty greenhouses used by 25,000+ growers since 2019, designed to withstand heavy winters. Backed by a 10-year warranty and live customer support.

pg shipping boxes
Shipping & assembly

Arrives in labeled boxes

Free shipping to the closest terminal in the lower 48. Every panel is pre-cut and every bag of hardware is labeled, so two people can build it with the step-by-step videos.

Questions? Talk to a grower.

Mon–Fri 9am–5pm EST or Send a Message

Call us 1-877-669-1286